package com.example.gateway.filter;


import org.springframework.cloud.gateway.filter.GatewayFilter;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

public class HeaderTokenGatewayFilter implements GatewayFilter, Ordered {

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {



        /**
         * 验证请求头中tkey为token，value为immoc的值
         *
         * */
        String token = exchange.getRequest().getHeaders().getFirst("token");
        if ("imooc".equals(token)) {
            return chain.filter(exchange);
        }

        //标记此次请求无权限
        exchange.getResponse().setStatusCode(HttpStatus.UNAUTHORIZED);
        return exchange.getResponse().setComplete();
    }

    @Override
    public int getOrder() {
        return HIGHEST_PRECEDENCE + 2;
    }
}